High sealing flange

Abstract

The utility model discloses a high-sealing flange, including a disk body, wherein the disk body is penetrated with a through hole for external pipelines to pass through along its axial direction, and the disk body is provided with a plurality of mounting holes for cooperating with external bolt threads to tightly connect the disk body with external tooling or flange, and the bottom surface of the disk body is a fitting surface for tightly fitting with external tooling or flange, and a sealing groove is provided on the fitting surface in an annular direction, and a sealing gasket is arranged in the sealing groove, and a driving ring is arranged in the sealing groove for applying a force to the sealing gasket when the temperature of the disk body rises so that the outer wall of the sealing gasket passes through the sealing groove and expands and fits with the outer wall of the external tooling or the inner wall of the flange, and the driving ring is made of shape memory alloy. The utility model solves the problem in the prior art that there is a lack of a flange that is adaptable to high-temperature working conditions and has high sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a high-sealing flange. Background Art

[0002] At present, flow equipment working under some special working conditions requires special flange components to seal or dock the flow pipeline of the equipment. For example, under high temperature conditions or when high-temperature liquids flow through the pipelines, the flange assembly at the joint of the pipelines is affected by the high temperature, causing the internal sealing ring to be slightly deformed. The sealing ring is restricted in the sealing groove, so its slight deformation will only cause the sealing ring to no longer be in a state of abutment or expansion fit with the docking flange or the docking tooling outer wall, that is, the seal fails. However, the prior art lacks a flange that can adapt to high-temperature working conditions and enable the sealing ring to stably expand and fit with the external tooling outer wall or the inner wall of the docking flange. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a high-sealing flange to solve the problem in the prior art of lacking a flange that is adaptable to high-temperature working conditions and has high sealing performance.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a high-sealing flange plate, including a plate body, wherein the plate body is penetrated by a through hole for the external pipeline to pass through along its axial direction, and a plurality of mounting holes for cooperating with external bolt threads to tightly connect the plate body with external tooling or flange are circumferentially opened on the plate body, and the bottom surface of the plate body is a fitting surface for tightly fitting with external tooling or flange, and a sealing groove is circumferentially opened on the fitting surface, and a sealing gasket is arranged in the sealing groove, and a driving ring is arranged in the sealing groove for applying a force to the sealing gasket when the temperature of the plate body rises so that the outer wall of the sealing gasket passes through the sealing groove and is tightly fitted with the outer wall of the external tooling or the inner wall of the flange, and the driving ring is made of shape memory alloy.

[0005] The advantages of adopting the above technical solution are: when the operator docks the disc body with the outer wall of the external tooling or the flange, the fixed connection of the disc body to the external tooling or the flange is achieved through the threaded connection of the bolts and the mounting holes. When the disc body is in a high-temperature working condition or the docking pipeline is connected with a high-temperature liquid, the temperature of the disc body is gradually heated up due to the influence. Because the drive ring is made of shape memory alloy, the drive ring is deformed by heat and applies force to the sealing gasket, so that the outer wall of the sealing gasket passes through the sealing groove and is tightly fitted with the outer wall of the external tooling or the inner wall of the flange, and the disc body is restricted by the bolts so that the sealing groove cannot move, so that the outer wall of the sealing gasket is squeezed by the drive ring and is tightly fitted with the inner wall of the external tooling or the flange, thereby achieving the disc body and the flange or the external Sealing between tooling; through the arrangement of the drive ring and the sealing gasket in the above technology, it is ensured that under high temperature conditions, if the sealing gasket is slightly deformed due to the influence of high temperature, resulting in a gap between the sealing gasket and the outer wall of the external tooling or the flange, the drive ring can apply force to the sealing gasket in real time to ensure that the sealing gasket is always tightly fitted with the outer wall of the external tooling or the flange, thereby ensuring the sealing strength between the disk body and the outer wall of the external tooling or the flange, thereby improving the sealing and preventing the intrusion of external impurities or the overflow of internal liquid; in the above technology, the drive ring is made of shape memory alloy material, which has different shapes under different temperature ranges. Since the shape memory alloy material is an existing material, its specific changing shape and principle will not be described in detail.

[0006] The utility model is further provided that: the drive ring has a first form within a first temperature range, and the drive ring has a second form within a second temperature range, the radial cross-section of the drive ring is arc-shaped, and the drive ring is composed of two end portions and a raised portion, the two end portions of the drive ring are respectively connected to the inner walls of both sides of the sealing groove, and the raised portion of the drive ring is raised toward the bottom wall of the sealing groove in the first form, and the drive ring is deformed in the second form, and its raised portion is raised toward the opening of the sealing groove and is abutted and matched with the inner wall of the sealing gasket.

[0007] The advantages of adopting the above technical solution are as follows: when the temperature of the disk body gradually rises due to the high temperature working condition, its temperature gradually rises to above 30 degrees, and this temperature range is the second temperature range. At this time, the drive ring has a second form in the second temperature range. The drive ring is deformed in the second form, and its raised portion rises toward the opening of the sealing groove and is abutted against the inner wall of the sealing gasket, that is, the drive ring applies a force to the sealing gasket to drive the sealing gasket to expand and fit with the outer wall of the external tooling or the flange, so as to improve the sealing strength between the two. When the disk body is no longer affected by the high temperature working condition, the temperature of the disk body gradually drops below 30 degrees, and this is the first temperature range. In the first form, the raised portion is raised toward the bottom wall of the sealing groove, that is, a certain force is no longer applied to the sealing gasket, so that the operator can easily replace or install the sealing gasket when disassembling the disk body, and it is also convenient for the operator to install the disk body; the setting in the above technology is used to ensure that under high temperature conditions, if the sealing gasket is slightly deformed due to the influence of high temperature, resulting in a gap between the sealing gasket and the outer wall of the external tooling or the flange, the driving ring can apply force to the sealing gasket in real time to ensure that the sealing gasket is always tightly fitted with the outer wall of the external tooling or the flange, thereby ensuring the sealing strength between the disk body and the outer wall of the external tooling or the flange, thereby improving the sealing performance.

[0008] The utility model is further configured that: inner walls on both sides of the sealing groove are both protruded with ribs, the two ribs are arranged opposite to each other and an extrusion notch is formed between the two ribs, and the two ribs are arranged near the opening of the sealing groove.

[0009] The benefit of adopting the above technical solution is that the ribs and extrusion notches in the above technology are arranged so that when the sealing gasket is under pressure and extends toward the opening of the sealing groove, the ribs can squeeze the two sides of the sealing gasket, so as to make the sealing gasket deform more and be squeezed outward from the extrusion notch, thereby improving the concentration of the force exerted on the deformation of the sealing gasket, that is, stress concentration, and thereby improving the sealing strength between the sealing gasket and the external tooling or flange.

[0010] The utility model is further configured as follows: the radial cross-section of the retaining edge is triangular and the inner circumferential wall of the retaining edge is a first inclined surface, the outer circumferential wall and the inner circumferential wall of the sealing gasket are connected to the outer circumferential wall of the sealing gasket in a smooth curved surface and form a second inclined surface, the two first inclined surfaces correspond one to one with the two second inclined surfaces and are abutted and matched.

[0011] The benefit of adopting the above technical solution is that: in the above technology, the cooperation between the first inclined surface and the second inclined surface enables the sealing gasket to be squeezed more concentratedly when under pressure, thereby improving the stress concentration degree.

[0012] The utility model is further provided that: the distance between the axis of the installation hole and the axis of the disc body is larger than the diameter of the sealing groove.

[0013] The benefit of adopting the above technical solution is that: in the above technology, the distance between the axis of the installation hole and the axis of the disk body is set larger than the diameter of the sealing groove, so that the sealing groove is located inside the installation hole to improve the sealing strength and avoid liquid overflow.

[0014] The utility model is further configured that: the sealing pad is made of a waterproof sealing rubber material.

[0015] The advantages of adopting the above technical solution are: the sealing gasket in the above technology is made of waterproof sealing rubber material, thereby improving the sealing strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional view of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model under high temperature working condition;

[0018] Figure 3 It is a cross-sectional view of the utility model in a state not subjected to high temperature working conditions. DETAILED DESCRIPTION

[0019] The utility model provides a high-sealing flange, comprising a disk body 1, wherein the disk body 1 is penetrated with a through hole 11 for external pipelines to pass through along its axial direction, and a plurality of mounting holes 12 for cooperating with external bolt threads to tightly connect the disk body 1 with external tooling or flange are circumferentially opened on the disk body 1, and the bottom surface of the disk body 1 is a fitting surface for tightly fitting with external tooling or flange, and a sealing groove 2 is circumferentially opened on the fitting surface, and a sealing gasket 3 is arranged in the sealing groove 2, and a driving ring 21 is arranged in the sealing groove 2 for applying a force to the sealing gasket 3 when the temperature of the disk body 1 rises so that the outer wall of the sealing gasket 3 passes through the sealing groove 2 and is tightly fitted with the outer wall of the external tooling or the inner wall of the flange, and the driving ring 21 is made of shape memory alloy, and the driving ring 21 has a first shape in a first temperature range, and the driving ring 21 has a second shape in a second temperature range, and the radial cross section of the driving ring 21 is in an arc shape, and the driving ring 21 is composed of two end portions 212 and a raised portion 211, and the two end portions of the driving ring 21 are 212 are respectively connected to the inner walls on both sides of the sealing groove 2. In the first form, the raised portion 211 of the driving ring 21 is raised toward the bottom wall of the sealing groove 2. In the second form, the driving ring 21 is deformed and its raised portion 211 is raised toward the opening of the sealing groove 2 and is abutted and matched with the inner wall of the sealing gasket 3. The inner walls on both sides of the sealing groove 2 are convex with ribs 22. The two ribs 22 are arranged opposite to each other and an extrusion notch 221 is formed between the two ribs 22. The two ribs 22 are arranged near the opening of the sealing groove 2. The radial cross-section of the ribs 22 is triangular and the inner circumferential wall of the ribs 22 is a first inclined surface 222. The outer circumferential wall and the inner circumferential wall of the sealing gasket 3 are connected to the outer side wall of the sealing gasket 3 in a smooth curved surface and a second inclined surface 31 is formed. The two first inclined surfaces 222 correspond to the two second inclined surfaces 31 one by one and are abutted and matched. The distance between the axis of the mounting hole 12 and the axis of the disk body 1 is greater than the diameter of the sealing groove 2. The sealing gasket 3 is made of waterproof sealing rubber material.

[0020] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A high-sealing flange, comprising a body, wherein the body is penetrated with a through hole for external pipelines along its axial direction, and the body is provided with a plurality of mounting holes for engaging with external bolt threads to tightly connect the body with external tooling or flange, characterized in that: The bottom surface of the disk body is a fitting surface for tightly fitting with external tooling or a flange, and a sealing groove is circumferentially provided on the fitting surface, a sealing gasket is arranged in the sealing groove, and a driving ring is arranged in the sealing groove for applying a force to the sealing gasket when the temperature of the disk body rises, so that the outer wall of the sealing gasket passes through the sealing groove and is tightly fitted with the outer wall of the external tooling or the inner wall of the flange, and the driving ring is made of shape memory alloy.

2. A high sealing flange according to claim 1, characterized in that: The drive ring has a first form within a first temperature range, and has a second form within a second temperature range. The radial cross-section of the drive ring is arc-shaped and the drive ring consists of two end portions and a raised portion. The two end portions of the drive ring are respectively connected to the inner walls of the sealing groove on both sides. In the first form, the raised portion of the drive ring is raised toward the bottom wall of the sealing groove. In the second form, the drive ring is deformed such that the raised portion is raised toward the opening of the sealing groove and is abutted against the inner wall of the sealing gasket.

3. A high sealing flange according to claim 2, characterized in that: The inner walls on both sides of the sealing groove are both protruded with ribs, the two ribs are arranged opposite to each other and an extrusion notch is formed between the two ribs, and the two ribs are arranged near the opening of the sealing groove.

4. A high sealing flange according to claim 3, characterized in that: The radial cross-section of the retaining edge is triangular and the inner peripheral wall of the retaining edge is a first inclined surface. The outer peripheral wall and the inner peripheral wall of the sealing gasket are connected to the outer peripheral wall of the sealing gasket in a smooth curved surface and form a second inclined surface. The two first inclined surfaces correspond to the two second inclined surfaces one by one and are abutted and matched.

5. The high sealing flange according to claim 1, characterized in that: The distance between the axis of the mounting hole and the axis of the disc body is greater than the diameter of the sealing groove.

6. The high sealing flange according to claim 1, characterized in that: The sealing pad is made of waterproof sealing rubber material.

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